Invention Grant
- Patent Title: Transparent thermoplastic polyurethanes having low haze and good processability, methods of making the same, and uses therefor
- Patent Title (中): 具有低雾度和良好加工性的透明热塑性聚氨酯，其制备方法及其用途
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Application No.: US12358356Application Date: 2009-01-23
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Publication No.: US08497341B2Publication Date: 2013-07-30
- Inventor: Henricus Peerlings , Faisal Shafiq , Markus Broich
- Applicant: Henricus Peerlings , Faisal Shafiq , Markus Broich
- Applicant Address: DE
- Assignee: Bayer MaterialScience AG
- Current Assignee: Bayer MaterialScience AG
- Current Assignee Address: DE
- Agency: Novak Druce Connolly Bove + Quigg LLP
- Priority: DE102008006003 20080125
- Main IPC: C08G18/32
- IPC: C08G18/32 ; C08G18/73
Abstract:
Light-stable, thermoplastic polyurethanes with good processability and having an ASTM D-1003 haze value of less than 10%, the polyurethane prepared by a process comprising: reacting: (a) a diisocyanate component comprising 1,6-hexamethylene diisocyanate; (b) a chain extension component consisting of (b1) 1,4-di(β-hydroxyethyl)hydroquinone and (b2) at least one chain extender selected from the group consisting of diols having a 2 or 3 carbon atom chain length between the two OH groups, in a molar ratio of chain extender (b1) to chain extender (b2) of 10:1 to 1:4; and (c) at least one polyol component having a number average molecular weight of 450 to 10000 g/mol, and an average number of Zerewitinoff-active hydrogen atoms of at least 1.8 to at most 3.0; wherein the ratio of isocyanate groups in component (a) to isocyanate-reactive groups in components (b) and (c) is 0.9:1 to 1.1:1.
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